<template>

    <div class="app-container">
  
      <h2 style="text-align: center;">发布新视频</h2>
  
      <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
        <el-step title="填写视频基本信息"/>
        <el-step title="创建视频大纲"/>
        <el-step title="最终发布"/>
      </el-steps>
  
  <el-button type="text" @click="openChapterDialog()">添加章节</el-button>
  
      <!-- 章节 -->
      <ul class="chanpterList">
          <li
              v-for="chapter in chapterVideoList"
              :key="chapter.id">
              <p>
                  {{ chapter.title }}
  
                  <span class="acts">
                      <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                      <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                      <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                  </span>
              </p>
  
              <!-- 视频 -->
              <ul class="chanpterList videoList">
                  <li
                      v-for="video in chapter.children"
                      :key="video.id">
                      <p>{{ video.title }}
  
                  <span class="acts">
                      
                      <el-button style="" type="text" >编辑</el-button>
                      <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                  </span>
                      </p>
                  </li>
              </ul>
          </li>
      </ul>
      <div>
          <el-button @click="previous">上一步</el-button>
          <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
      </div>
  
      <!-- 添加和修改章节表单 -->
      <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
          <el-form :model="chapter" label-width="120px">
              <el-form-item label="章节标题">
                  <el-input v-model="chapter.title"/>
              </el-form-item>
              <el-form-item label="章节排序">
                  <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
              </el-form-item>
          </el-form>
          <div slot="footer" class="dialog-footer">
              <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
              <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
          </div>
      </el-dialog>
  
      <!-- 添加和修改课时表单 -->
  <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
    <el-form :model="video" label-width="120px">
      <el-form-item label="课时标题">
        <el-input v-model="video.title"/>
      </el-form-item>
      <el-form-item label="课时排序">
        <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
      </el-form-item>
      <el-form-item label="是否免费">
        <el-radio-group v-model="video.free">
          <el-radio :label="true">免费</el-radio>
          <el-radio :label="false">默认</el-radio>
        </el-radio-group>
      </el-form-item>
  
      <el-form-item label="上传视频">
          <el-upload
              :on-success="handleVodUploadSuccess"
              :on-remove="handleVodRemove"
              :before-remove="beforeVodRemove"
              :on-exceed="handleUploadExceed"
              :file-list="fileList"
              :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
              :limit="1"
              class="upload-demo">
          <el-button size="small" type="primary">上传视频</el-button>
          <el-tooltip placement="right-end">
              <div slot="content">最大支持1G，<br>
                  支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                  GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                  MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                  SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
              <i class="el-icon-question"/>
          </el-tooltip>
          </el-upload>
      </el-form-item>
  
    </el-form>
    <div slot="footer" class="dialog-footer">
      <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
      <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
    </div>
  </el-dialog>
  
    </div>
  </template>
  <script>
  import chapter from '@/api/edu/chapter'
  import video from '@/api/edu/video'
  
  export default {
      data() {
          return {
              saveBtnDisabled:false,
              courseId:'',//视频id
              chapterVideoList:[],
              chapter:{ //封装章节数据
                  title: '',
                  sort: 0
              },
              video: {
                  title: '',
                  sort: 0,
                  free: 0,
                  videoSourceId: '',
                  videoOriginalName:''//视频名称
              },
              dialogChapterFormVisible:false,//章节弹框
              dialogVideoFormVisible:false, //小节弹框
  
  
              fileList: [],//上传文件列表
              BASE_API: process.env.BASE_API // 接口API地址
          }
      },
      created() {
          //获取路由的id值
          if(this.$route.params && this.$route.params.id) {
              this.courseId = this.$route.params.id
              //根据视频id查询章节和小节
              this.getChapterVideo()
          }
      },
      methods:{
          //点击确定调用的方法
          handleVodRemove() {
              //调用接口的删除视频的方法
              video.deleteAliyunvod(this.video.videoSourceId)
                  .then(response => {
                      //提示信息
                      this.$message({
                          type: 'success',
                          message: '删除视频成功!'
                      });
                      //把文件列表清空
                      this.fileList = []
                      //把video视频id和视频名称值清空
                      //上传视频id赋值
                      this.video.videoSourceId = ''
                      //上传视频名称赋值
                      this.video.videoOriginalName = ''
                  })
          },
          //点击 × 调用这个方法
          beforeVodRemove(file,fileList) {
              return this.$confirm(`确定移除 ${ file.name }？`);
          },
          //上传视频成功调用的方法
          handleVodUploadSuccess(response, file, fileList) {
              //上传视频id赋值
              this.video.videoSourceId = response.data.videoId
              //上传视频名称赋值
              this.video.videoOriginalName = file.name
          },
          handleUploadExceed() {
              this.$message.warning('想要重新上传视频，请先删除已上传的视频')
          },
  //==============================小节操作====================================
          //删除小节
          removeVideo(id) {
              this.$confirm('此操作将删除小节, 是否继续?', '提示', {
                  confirmButtonText: '确定',
                  cancelButtonText: '取消',
                  type: 'warning'
              }).then(() => {  //点击确定，执行then方法
                  //调用删除的方法
                  video.deleteVideo(id)
                      .then(response =>{//删除成功
                      //提示信息
                      this.$message({
                          type: 'success',
                          message: '删除小节成功!'
                      });
                      //刷新页面
                      this.getChapterVideo()
                  })
              }) //点击取消，执行catch方法
          },
          //添加小节弹框的方法
          openVideo(chapterId) {
              //弹框
              this.dialogVideoFormVisible = true
              //清空
              this.video = {}
              this.fileList = []
              //设置章节id
              this.video.chapterId = chapterId
          },
          //添加小节
          addVideo() {
              //设置视频id
              this.video.courseId = this.courseId
              video.addVideo(this.video)
                  .then(response => {
                      //关闭弹框
                      this.dialogVideoFormVisible = false
                      //提示
                      this.$message({
                          type: 'success',
                          message: '添加小节成功!'
                      });
                      //刷新页面
                      this.getChapterVideo()
                  })
          },
          saveOrUpdateVideo() {
              this.addVideo()
          },
  
  //==============================章节操作====================================
          //删除章节
          removeChapter(chapterId) {
              this.$confirm('此操作将删除章节, 是否继续?', '提示', {
                  confirmButtonText: '确定',
                  cancelButtonText: '取消',
                  type: 'warning'
              }).then(() => {  //点击确定，执行then方法
                  //调用删除的方法
                  chapter.deleteChapter(chapterId)
                      .then(response =>{//删除成功
                      //提示信息
                      this.$message({
                          type: 'success',
                          message: '删除成功!'
                      });
                      //刷新页面
                      this.getChapterVideo()
                  })
              }) //点击取消，执行catch方法
          },
          //修改章节弹框数据回显
          openEditChatper(chapterId) {
              //弹框
              this.dialogChapterFormVisible = true
              //调用接口
              chapter.getChapter(chapterId)   
                  .then(response => {
                      this.chapter = response.data.chapter
                  })
          },
          //弹出添加章节页面
          openChapterDialog() {
              //弹框
              this.dialogChapterFormVisible = true
              //表单数据清空
              this.chapter.title = ''
              this.chapter.sort = 0
          },
          //添加章节
          addChapter() {
              //设置视频id到chapter对象里面
              this.chapter.courseId = this.courseId
              chapter.addChapter(this.chapter)
                  .then(response => {
                      //关闭弹框
                      this.dialogChapterFormVisible = false
                      //提示
                      this.$message({
                          type: 'success',
                          message: '添加章节成功!'
                      });
                      //刷新页面
                      this.getChapterVideo()
                  })
          },
          //修改章节的方法
          updateChapter() {
              chapter.updateChapter(this.chapter)
                  .then(response =>  {
                      //关闭弹框
                      this.dialogChapterFormVisible = false
                      //提示
                      this.$message({
                          type: 'success',
                          message: '修改章节成功!'
                      });
                      //刷新页面
                      this.getChapterVideo()
                  })
          },
          saveOrUpdate() {
              if(!this.chapter.id) {
                  this.addChapter()
              } else {
                  this.updateChapter()
              }
          },
          //根据视频id查询章节和小节
          getChapterVideo() {
              chapter.getAllChapterVideo(this.courseId)
                  .then(response => {
                      this.chapterVideoList = response.data.allChapterVideo
                  })
          },
          previous() {
              this.$router.push({path:'/course/info/'+this.courseId})
          },
          next() {
              //跳转到第二步
              this.$router.push({path:'/course/publish/'+this.courseId})
          }
      }
  }
  </script>
  <style scoped>
  .chanpterList{
      position: relative;
      list-style: none;
      margin: 0;
      padding: 0;
  }
  .chanpterList li{
    position: relative;
  }
  .chanpterList p{
    float: left;
    font-size: 20px;
    margin: 10px 0;
    padding: 10px;
    height: 70px;
    line-height: 50px;
    width: 100%;
    border: 1px solid #DDD;
  }
  .chanpterList .acts {
      float: right;
      font-size: 14px;
  }
  
  .videoList{
    padding-left: 50px;
  }
  .videoList p{
    float: left;
    font-size: 14px;
    margin: 10px 0;
    padding: 10px;
    height: 50px;
    line-height: 30px;
    width: 100%;
    border: 1px dotted #DDD;
  }
  
  </style>